Live flood monitor

Real-time river flooding
across America.

Live USGS streamgauge readings, FEMA flood zones, NWS flood watches and warnings, and historical context — one map, refreshed throughout the day. Built for flood researchers, emergency managers, and outdoor recreationists.

Last updated June 24, 2026 · 168 sensors live
Rivers above flood
55
Watersheds elevated
126
Active flood sensors
168
USGS gauges tracked
10K+
Layers
Flow vs. normal
< 50%
~ 100%
200%
500%+
Tiles © Mapbox · Data USGS, NOAA NWS, FEMA, NRCS · Click any feature for details · Multiple layers under your click aggregate into one popup.
Today's flood briefing

What's happening right now

An AI-generated daily summary stitched from active streamgauge readings, NWS warnings, and watershed status.

June
24
2026
Flood report
# CATASTROPHIC FLOODING CRISIS SWEEPS NATION AS WATERWAYS SURGE TO DANGEROUS LEVELS

**IMMEDIATE ALERT:** A devastating flooding emergency is unfolding across multiple states as dozens of rivers and watersheds have exploded to extreme and life-threatening levels. The Navasota River in Texas has skyrocketed to an astronomical 25,000% of normal flow, while Kansas's Fall River watershed has reached a staggering 39,700% above typical levels. From the Gulf Coast through the Midwest and into the Southeast, communities are experiencing unprecedented water surges following Tropical Storm Arthur and relentless severe weather systems. Residents in affected areas face immediate danger from rapidly rising waters, with emergency services conducting widespread rescues and the Red Cross expanding relief operations across Louisiana and Mississippi.

The scope of this flooding disaster is truly historic, with critical situations developing in major population centers. In Louisiana, the Calcasieu River near Lake Charles is running at 2,135% of normal, while the Boeuf River has surged to nearly 2,000% above average. Texas communities along the San Gabriel River near Georgetown are facing flows exceeding 7,700% of normal, creating catastrophic conditions. The Neosho River system in Kansas and Oklahoma, flowing through communities like Parsons and Miami, has exploded to nearly 2,900% of normal capacity, threatening widespread devastation. Illinois faces a multi-front crisis as the Illinois River near Peoria runs at 224% of normal while the Kaskaskia River near Carlyle has jumped to 1,658% above typical levels. The situation in Mississippi is equally dire, where the Pascagoula River near Merrill has surged to 1,130% of normal, the Leaf River near Hattiesburg sits at 1,984% above average, and the Chickasawhay River has reached 1,812% of normal flow. In Avoyelles Parish, Louisiana, 86 people and 20 pets have already been rescued from floodwaters following Tropical Storm Arthur's remnants, with some areas remaining isolated days after the initial flooding.

Emergency officials are issuing urgent "do not drive" warnings across five states as the flood threat expands along a 1,000-mile corridor from Nebraska to the Florida Panhandle. The Wabash River system in Indiana, flowing through Terre Haute and Vincennes, is running at 187% of normal with tributaries like the Little Wabash near Carmi reaching a catastrophic 3,785% above average. Georgia's Little Satilla River near Offerman has exploded to 8,806% of normal flow, while the Satilla River system threatens communities including Waycross. Alabama's Tombigbee River near Demopolis is surging at 466% of normal capacity, creating dangerous conditions for riverside towns. Arkansas communities along the Arkansas River near Russellville face flows at 1,826% of normal. Authorities warn that post-storm dangers—including compromised infrastructure, contaminated floodwaters, and unstable riverbanks—can be deadlier than the initial storm event. Residents in flood-prone areas are urged to evacuate immediately, avoid all flooded roadways, and file insurance claims promptly as FEMA coordinates with state emergency management agencies to address this multi-state catastrophe.
Right now

Rivers currently flooding or rising

Live USGS streamgauge readings aggregated by river. Percent-of-normal compares current flow to the seasonal average.

River Observed (cfs) Seasonal avg (cfs) vs. Normal
Little Satilla River 4,390 50 ↑ 8806% of normal
Sangamon River 6,250 947 ↑ 660% of normal
Black Warrior River 13,600 3,690 ↑ 369% of normal
Arkansas River 25,200 1,380 ↑ 1826% of normal
Satilla River 8,320 172 ↑ 4851% of normal
Escambia River 26,600 2,470 ↑ 1077% of normal
Wabash River 109,400 58,450 ↑ 187% of normal
Salt River 447 46 ↑ 978% of normal
Cimarron River 175 29 ↑ 601% of normal
Chickasawhay River 25,000 1,380 ↑ 1812% of normal
Delaware River 1,790 189 ↑ 950% of normal
Antoine River 244 25 ↑ 982% of normal
Kaskaskia River 2,190 268 ↑ 817% of normal
Nueces River 1,460 256 ↑ 571% of normal
Pascagoula River 142,600 12,615 ↑ 1130% of normal
Embarras River 12,770 2,009 ↑ 636% of normal
White River 34,610 13,285 ↑ 261% of normal
Wakarusa River 213 15 ↑ 1420% of normal
Shoal River 4,870 587 ↑ 830% of normal
Duck River 9,686 732 ↑ 1323% of normal
Blackwater River 466 57 ↑ 812% of normal
Chariton River 1,970 37 ↑ 5324% of normal
Guyandotte River 987 150 ↑ 658% of normal
Little Wabash River 10,565 279 ↑ 3785% of normal
Conecuh River 7,440 791 ↑ 941% of normal
Edwards River 3,210 369 ↑ 870% of normal
Navasota River 15,130 60 ↑ 25029% of normal
Cedar River 14 132 10% of normal
Sabine River 384 11 ↑ 3459% of normal
Leaf River 37,900 1,910 ↑ 1984% of normal
Tombigbee River 110,720 23,760 ↑ 466% of normal
Boeuf River 296 15 ↑ 1941% of normal
Little Calumet River 669 62 ↑ 1079% of normal
Buffalo River 13,095 1,086 ↑ 1205% of normal
Cocheco River 419 49 ↑ 863% of normal
Caney River 2,540 64 ↑ 3994% of normal
Blanchard River 1,283 161 ↑ 798% of normal
Lampasas River 716 45 ↑ 1604% of normal
Isinglass River 344 35 ↑ 996% of normal
Alapaha River 1,160 91 ↑ 1276% of normal
Samish River 36 49 73% of normal
Ottawa River 204 19 ↑ 1091% of normal
Sepulga River 2,620 162 ↑ 1617% of normal
Verdigris River 14,632 587 ↑ 2493% of normal
Sucarnoochee River 5,500 242 ↑ 2277% of normal
Deep River 1,050 88 ↑ 1193% of normal
Raquette River 2,200 273 ↑ 806% of normal
Pearl River 77,970 11,058 ↑ 705% of normal
Neosho River 129,400 4,490 ↑ 2882% of normal
Illinois River 121,428 54,158 ↑ 224% of normal
Calcasieu River 2,830 133 ↑ 2136% of normal
Blue River 3,850 102 ↑ 3775% of normal
Yellow River 6,590 402 ↑ 1639% of normal
Wild Rice River 59 377 16% of normal
Little River 1,500 175 ↑ 859% of normal
By basin

Watersheds running elevated

Aggregated by HUC8 watershed code. Useful for catchment-level flood-risk assessment.

HUC8 code Watershed Observed (cfs) vs. Normal
h07140101 Cahokia-Joachim 4,340 ↑ 687%
h03110202 Alapaha 1,160 ↑ 1276%
h05140201 Lower Ohio-Little Pigeon 380 ↑ 2754%
h11070107 Bird 6,110 ↑ 1869%
h11070106 Caney 2,540 ↑ 3994%
h11070101 Upper Verdigris 232 ↑ 967%
h03110204 Little 243 ↑ 2435%
h11070102 Fall 2,680 ↑ 39704%
h12040104 Buffalo-San Jacinto 211 ↑ 3836%
h12040102 Spring 161 ↑ 813%
h05130101 Upper Cumberland 407 ↑ 1696%
h03120003 Lower Ochlockonee 640 ↑ 766%
h05120111 Middle Wabash-Busseron 35,900 ↑ 197%
h05120202 Lower White 33,020 ↑ 251%
h03080103 Lower St. Johns 65,893 54%
h08080102 Bayou Teche 1,920 ↑ 1208%
h07080104 Flint-Henderson 6,580 ↑ 911%
h03140202 Pea 7,510 ↑ 1198%
h11110202 Dardanelle Reservoir 864 ↑ 1176%
h11110201 Frog-Mulberry 225 ↑ 3299%
h08040103 Little Missouri 244 ↑ 982%
h05050009 Coal 3,242 ↑ 1345%
h11070205 Middle Neosho 3,190 ↑ 36667%
h11070103 Middle Verdigris 14,400 ↑ 2558%
h11070208 Elk 290 ↑ 792%
h11070209 Lower Neosho 109,780 ↑ 3495%
h05140104 Blue-Sinking 222 ↑ 890%
h03070202 Little Satilla 4,390 ↑ 8806%
h03070201 Satilla 8,320 ↑ 4851%
h11040008 Upper Cimarron-Bluff 175 ↑ 601%
h06030004 Lower Elk 8,960 ↑ 868%
h17110002 Strait Of Georgia 36 73%
h05140101 Silver-Little Kentucky 346 ↑ 865%
h04100007 Auglaize 204 ↑ 1091%
h03170006 Pascagoula 142,600 ↑ 1130%
h03170007 Black 5,012 ↑ 990%
h03170005 Lower Leaf 37,900 ↑ 1984%
h03170003 Lower Chickasawhay 25,000 ↑ 1812%
h04100008 Blanchard 1,283 ↑ 798%
h03170001 Chunky-Okatibbee 1,720 ↑ 930%
h04040001 Little Calumet-Galien 1,719 ↑ 1146%
h11140103 Muddy Boggy 7,920 ↑ 2296%
h11140102 Blue 3,850 ↑ 3775%
h12020007 Pine Island Bayou 1,810 ↑ 3229%
h03160113 Lower Black Warrior 13,600 ↑ 369%
h11110104 Robert S. Kerr Reservoir 1,920 ↑ 1501%
h11110103 Illinois 1,012 ↑ 1075%
h03180001 Upper Pearl 9,120 ↑ 3544%
h02010003 Winooski 1,102 ↑ 941%
h03180003 Middle Pearl-Silver 27,300 ↑ 722%
h03180002 Middle Pearl-Strong 27,835 ↑ 1042%
h03180004 Lower Pearl. Mississippi 20,100 ↑ 444%
h03140103 Yellow 11,460 ↑ 1159%
h12070205 San Gabriel 1,385 ↑ 7770%
h07120004 Des Plaines 1,280 ↑ 279%
h07120003 Chicago 409 ↑ 851%
h12070203 Lampasas 716 ↑ 1604%
h05100102 South Fork Licking 3,930 ↑ 613%
h03130009 Ichawaynochaway 691 ↑ 2026%
h12040204 West Galveston Bay 716 ↑ 3127%
h03130004 Lower Chattahoochee 246 ↑ 840%
h03160106 Middle Tombigbee-Lubbub 13,620 ↑ 290%
h12030108 Richland 466 ↑ 5210%
h10280203 Little Chariton 360 ↑ 610%
h10280201 Upper Chariton 1,970 ↑ 5324%
h11140203 Loggy Bayou 1,390 ↑ 4344%
h11140208 Saline Bayou 535 ↑ 2892%
h08060202 Lower Big Black 11,300 ↑ 1470%
h10290101 Upper Marais Des Cygnes 1,805 ↑ 4252%
h11010001 Beaver Reservoir 2,553 ↑ 1338%
h11010005 Buffalo 3,245 ↑ 906%
h05070101 Upper Guyandotte 2,387 ↑ 1163%
h12070102 Yegua 794 ↑ 851%
h12070103 Navasota 15,130 ↑ 25029%
h11130304 Lower Washita 489 ↑ 1498%
h10270104 Lower Kansas 213 ↑ 1420%
h03160201 Middle Tombigbee-Chickasaw 97,100 ↑ 509%
h10270103 Delaware 1,790 ↑ 950%
h03160202 Sucarnoochee 5,500 ↑ 2277%
h03140104 Blackwater 466 ↑ 812%
h11130201 Farmers-Mud 440 ↑ 1639%
h12030103 Elm Fork Trinity 3,990 ↑ 747%
h12010001 Upper Sabine 384 ↑ 3459%
h05120114 Little Wabash 10,565 ↑ 3785%
h05120113 Lower Wabash 73,500 ↑ 183%
h05120112 Embarras 16,390 ↑ 788%
h09020105 Western Wild Rice 59 16%
h12030109 Chambers 212 ↑ 12254%
h07110001 Bear-Wyaconda 509 ↑ 1113%
h17110012 Lake Washington 28 54%
h11130303 Middle Washita 590 ↑ 2107%
h01060003 Piscataqua-Salmon Falls 763 ↑ 918%
h08030207 Big Sunflower 2,380 ↑ 643%
h10260006 Middle Smoky Hill 283 ↑ 7567%
h11140302 Lower Sulphur 23,370 ↑ 92941%
h08040206 Bayou D'Arbonne 977 ↑ 4333%
h10260008 Lower Smoky Hill 1,240 ↑ 709%
h12110105 Middle Nueces 1,460 ↑ 571%
h11030014 North Fork Ninnescah 528 ↑ 1067%
h11030013 Middle Arkansas-Slate 25,200 ↑ 1826%
h11030012 Little Arkansas 1,120 ↑ 679%
h08080203 Upper Calcasieu 2,830 ↑ 2136%
h03140305 Escambia 27,830 ↑ 1060%
h03140302 Patsaliga 2,720 ↑ 1600%
h03140303 Sepulga 2,620 ↑ 1617%
h03140301 Upper Conecuh 7,440 ↑ 941%
h07130011 Lower Illinois 71,500 ↑ 216%
h08050001 Boeuf 296 ↑ 1941%
h15010015 Las Vegas Wash 212 ↑ 636%
h06040004 Buffalo 9,850 ↑ 1353%
h04150305 Raquette 2,200 ↑ 806%
h07130006 Upper Sangamon 6,250 ↑ 660%
h11070206 Lake O'Cherokees 27,425 ↑ 1992%
h03150106 Middle Coosa 484 ↑ 864%
h11070104 Elk 417 ↑ 1503%
h06040003 Lower Duck 9,340 ↑ 1383%
h06040002 Upper Duck 346 ↑ 609%
h06040001 Lower Tennessee-Beech 591 ↑ 660%
h05140102 Salt 1,101 ↑ 778%
h05140103 Rolling Fork 2,190 ↑ 725%
h07130009 Salt 1,330 ↑ 782%
h07140203 Shoal 4,550 ↑ 1572%
h07140202 Middle Kaskaskia 1,860 ↑ 16174%
h07140201 Upper Kaskaskia 2,190 ↑ 817%
h07130001 Lower Illinois-Senachwine Lake 49,500 ↑ 236%
h07140204 Lower Kaskaskia 422 ↑ 1658%
Background

What causes river flooding

Flooding is rarely a single-cause event — multiple factors usually compound. The most common drivers across the U.S.

🌧

Heavy rainfall

Persistent rain saturates soils and overwhelms drainage networks. Tropical systems and atmospheric rivers are the worst culprits.

Rapid snowmelt

Spring melt pulses can deliver months of accumulated water in days — especially when warm rain falls on existing snowpack.

🧊

Ice jams

Breakup ice can block channels, forcing water to back up and inundate upstream banks. Common on northern rivers in early spring.

🌊

Storm surge

Coastal hurricanes push seawater inland. Surge combined with rainfall is the deadliest flood scenario in U.S. history.

🛡

Reservoir releases

Controlled dam releases can dramatically increase downstream flow. USACE and USBR publish release schedules, but conditions change fast.

🌌

Burn scars

Wildfire-stripped slopes can't absorb rainfall — even modest storms produce dangerous flash floods on burned watersheds for years afterward.

Safety

Flood preparedness checklist

Floodwaters rise faster than most people expect. The basics that save lives.

1
Never drive through floodwaterSix inches can stall a car; two feet floats most vehicles. Turn around — don't drown.
2
Monitor levels near youTrack the gauges upstream of your location. Snoflo's push alerts can ping you the moment a threshold is crossed.
3
Have an evacuation planKnow two routes out and where higher ground sits. If officials issue an evacuation order, leave — don't wait.
4
Move valuables upDocuments, electronics, and sentimentals to upper floors. Disconnect electrical at the main breaker if water enters the structure.
5
Trust official sourcesNWS warnings and local emergency management are the authoritative source. Snoflo data is informational; always cross-check.
6
After the water recedesDon't return until officials clear the area. Floodwater carries sewage, fuel, and downed power. Document damage before cleanup.
Frequently asked

Flood map & river monitoring FAQ

What does "percent of normal" mean?

The current flow at a gauge compared to its seasonal average for this date. 100% means flow is right at the historical norm. 200%+ means twice the typical flow — a strong indicator of flood conditions on small-to-medium rivers.

What's the difference between a flood watch and a flood warning?

Watch: conditions are favorable for flooding within the next 12–48 hours. Warning: flooding is happening or imminent. Both come from the National Weather Service. Snoflo overlays both as toggleable layers on the map above.

How often does Snoflo's data refresh?

USGS streamgauge readings update every 15 minutes; we re-pull every hour. NWS warning polygons update as the NWS issues them — usually within 5 minutes. FEMA flood zones are static (the National Flood Hazard Layer is updated quarterly).

What is the FEMA flood zone layer?

FEMA's National Flood Hazard Layer (NFHL) shows the 1%-annual-chance ("100-year") and 0.2%-annual-chance ("500-year") floodplains. These are based on long-term hydrologic modeling, not current conditions. Useful for property risk; not a real-time signal.

Can I get an alert when my local river floods?

Yes. Save any USGS gauge as a favorite in the Snoflo iOS app, set a threshold (e.g. "alert me at 20 ft stage"), and you'll get a push the moment it crosses. Free with a Snoflo account.

Is Snoflo a substitute for official warnings?

No. Snoflo is informational. For life-safety decisions always follow guidance from local emergency management, the NWS, and law enforcement.